NO154321B - CONTROL UNIT FOR AN AIR DISTRIBUTION SYSTEM. - Google Patents
CONTROL UNIT FOR AN AIR DISTRIBUTION SYSTEM. Download PDFInfo
- Publication number
- NO154321B NO154321B NO814052A NO814052A NO154321B NO 154321 B NO154321 B NO 154321B NO 814052 A NO814052 A NO 814052A NO 814052 A NO814052 A NO 814052A NO 154321 B NO154321 B NO 154321B
- Authority
- NO
- Norway
- Prior art keywords
- damper
- flow path
- control unit
- screen
- perforated screen
- Prior art date
Links
- 239000002184 metal Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
- F16F13/10—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
- F24F2013/1433—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means with electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
- F24F2013/1466—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means with pneumatic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
- F24F13/1426—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means
- F24F2013/1473—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre characterised by actuating means with cams or levers
Abstract
Description
Foreliggende oppfinnelse angår styreenhet for et luftfordelingssystem av den art som angitt i innledningen til krav 1. The present invention relates to a control unit for an air distribution system of the type stated in the introduction to claim 1.
Luftstrømningsanordninger slik som dempere er utsatt for selv frembringende støy som en funksjon av hastigheten og trykket til den tilførte luften såvel som konstruksjonsdetaljer ved luftfordelingssystemet. Forskjellige teknikker har blitt anvendt for å redusere støyfrembringelsen. Luftfordelingssystemet har f.eks. blitt foret med lydabsorberende materialer og diffusorer i form av perforerte plater har blitt anordnet på tvers av strømningsbanen. Disse metodene har blitt anvendt med varierende hell. Det er nødvendig med en overdrevet tyk-kelse på de lysabsorberende materialene for å dempé lavfre-kvensstøy. Perforerte plater kan bevirke for store trykkfall og lavfrekvensstøyen kan bli opprettet på nytt i denne sammen-førte strømmen. Denne teknikken har dessuten ikke noen løs-ning på støyproblemene som følge av strømningen over kantene til metallplatedeler. Airflow devices such as dampers are subject to self-generated noise as a function of the velocity and pressure of the supplied air as well as design details of the air distribution system. Various techniques have been used to reduce noise generation. The air distribution system has e.g. have been lined with sound-absorbing materials and diffusers in the form of perforated plates have been arranged across the flow path. These methods have been used with varying degrees of success. An exaggerated thickness of the light-absorbing materials is necessary to dampen low-frequency noise. Perforated plates can cause large pressure drops and the low-frequency noise can be created again in this combined flow. This technique also has no solution to the noise problems resulting from the flow over the edges of sheet metal parts.
Foreliggende oppfinnelse angår en styreenhet av den art som angitt i innledningen og hvis karakteristiske trekk fremgår av krav 1. Ytterligere trekk ved oppfinnelsen fremgår av underkravene. The present invention relates to a control unit of the type stated in the introduction and whose characteristic features appear in claim 1. Further features of the invention appear in the subclaims.
Foreliggende oppfinnelse frembringer i hovedsaken en perforert forlengelse av demperbladet slik at strømningsbanen aldri kun er gjennom en smal spalte, men gjennom perforeringen til for-lengelsen inntil demperen har blitt åpnet tilstrekkelig. Ved lukkingen er strømningsbanen kun gjennom perforeringen når den nærmerer seg det punktet som normalt vil være en smal spalte for strømningsbanen ved en vanlig demperanordning. Veggen til luftfordelingssystemet nærmest strømningsbanen ved åpning- og lukkestillingen til demperenheten kan dessuten være foret med en perforert skjerm som er anordnet med avstand fra veggen for å definere et kammer som reduserer virvler og lavfrekvens-støy uten å utgjør en hindring i strømningsbanen. The present invention essentially produces a perforated extension of the damper blade so that the flow path is never only through a narrow gap, but through the perforation of the extension until the damper has been sufficiently opened. During the closing, the flow path is only through the perforation when it approaches the point which would normally be a narrow gap for the flow path in the case of a conventional damper device. The wall of the air distribution system closest to the flow path at the opening and closing position of the damper unit may also be lined with a perforated screen spaced from the wall to define a chamber that reduces swirl and low frequency noise without obstructing the flow path.
Oppfinnelsen skal nå bli beskrevet ved hjelp av eksempel med henvisning til medfølgende tegninger, hvor: Fig. 1 viser et riss av en demperenhet ifølge foreliggende The invention will now be described by way of example with reference to accompanying drawings, where: Fig. 1 shows a diagram of a damper unit according to the present
oppfinnelse. invention.
Fig. 2 viser et lengdesnitt av demperenheten ved et luftfor delingssystem. Fig. 3 viser en tabell over effektiviteten til elementene Fig. 2 shows a longitudinal section of the damper unit with an air liner sharing system. Fig. 3 shows a table of the efficiency of the elements
til foreliggende oppfinnelse alene og i kombinasjon. to the present invention alone and in combination.
På fig. 1 betegner henvisningstallet 10 en demperenhet som har et hus 12. Demperen 20 er dreibar om en stang 21 og innbefat-ter et kurveformet blad 22 som har en ventilvirkning med hen-syn til innløpet definert av metallplatedelen 16, 17, 18 og 19 som danner en del av huset 12 til demperenheten 10. En perforert skjerm 30 festet til og forløper over bladet 22. In fig. 1, the reference number 10 denotes a damper unit which has a housing 12. The damper 20 is rotatable about a rod 21 and includes a curved blade 22 which has a valve action with respect to the inlet defined by the metal plate part 16, 17, 18 and 19 which form a part of the housing 12 of the damper unit 10. A perforated screen 30 attached to and extending over the blade 22.
Som det fremgår av fig. 2 er skjermen 30 utformet som to ben, 31 og 32, med en foretrukket vinkel på 75°. Skjermens 30 ben 32 er festet til demperens 20 ben 23 slik at skjermens ben 31 forløper over bladet 22 i en avstand på 1,27 cm til 2,54 cm, idet 1,91 cm er foretrukket. Perforeringen er fortrinnsvis 0,48 cm i diameter og hvis sentre ligger på hjørnet til like-formede trekanter med sidelengder på 0,64 cm. Skjermens 30 porøsitet blir således 51%, men den kan bli variert fra om-kring 35% til 65% med godtagbare resultater. As can be seen from fig. 2, the screen 30 is designed as two legs, 31 and 32, with a preferred angle of 75°. The leg 32 of the screen 30 is attached to the leg 23 of the damper 20 so that the leg 31 of the screen extends over the blade 22 at a distance of 1.27 cm to 2.54 cm, 1.91 cm being preferred. The perforation is preferably 0.48 cm in diameter and whose centers lie at the corner of equilateral triangles with side lengths of 0.64 cm. The porosity of the screen 30 is thus 51%, but it can be varied from about 35% to 65% with acceptable results.
Skjermens 30 ben 31 faller generelt innenfor en pluss eller minus 20° stilling fra et plan perpendikulært på luftstrømmen når demperbladet 2 2 beveges fra dens fulle, åpne stilling til dens fullstendig lukkede stilling når vinkelen mellom benene 31 og 32 er 75°. Benets 32 fremre kant til skjermen 30 er på linje med den fremre kanten til bladet 22. Skjermen 30 reduserer turbulensen bevirket av demperen som igjen reduserer den lavfrekvente støyen frembrakt av slik luftturbulens. Størrelsen og porøsiteten til skjermens 30 ben 31 er kritisk. Dersom benet 31 er mindre enn 1,27 cm i høyde så vil der ikke være nok hull i skjermen for å bryte turbulensen og noen av virvlene vil rulle over toppen av skjermen. Dersom benet 31 Legs 31 of the screen 30 generally fall within a plus or minus 20° position from a plane perpendicular to the airflow when the damper blade 22 is moved from its fully open position to its fully closed position when the angle between the legs 31 and 32 is 75°. The front edge of the leg 32 to the screen 30 is in line with the front edge of the blade 22. The screen 30 reduces the turbulence caused by the damper which in turn reduces the low frequency noise produced by such air turbulence. The size and porosity of the legs 31 of the screen 30 are critical. If leg 31 is less than 1.27 cm in height, there will not be enough holes in the screen to break the turbulence and some of the eddies will roll over the top of the screen. If the leg 31
er over 2,54 cm i høyde vil det strekke seg for langt inn i luftstrømmen slik at et for stor trykkfall vil bli tilveie-brakt og lufttrykket som virker på skjermen 30 vil løfte bladet 22. is over 2.54 cm in height, it will extend too far into the air stream so that too great a pressure drop will be provided and the air pressure acting on the screen 30 will lift the blade 22.
En andre skjerm 4 0 er anordnet umiddelbart nedstrøms av demperbladet 22 slik at luftstrømmen gjennom demperen er over skjermen 40. Strømmen gjennom demperen 2 0 frembringer store virvler umiddelbart nedstrøms av demperen, men skjermen 40 og kammeret 42, delvis definert av skjermen 40, bryter opp de store virvlene og reduserer derved strålingsstøynivåene. Skjermens 40 porøsitet er ikke kritisk siden strømbanen ikke er gjennom skjermen 40, men den må heller kun frembringe en ikke-strålende overflate for lydbølger som følge av virvler frembrakt ved strømningen over metallplatekantene til demperen. En porøsi-tet på 35-65% gir imidlertid godtagbare resultater. A second screen 40 is arranged immediately downstream of the damper blade 22 so that the air flow through the damper is above the screen 40. The flow through the damper 20 produces large vortices immediately downstream of the damper, but the screen 40 and the chamber 42, partially defined by the screen 40, break up the large eddies and thereby reduce the radiated noise levels. The porosity of the shield 40 is not critical since the flow path is not through the shield 40, but rather it must only provide a non-radiating surface for sound waves as a result of vortices produced by the flow over the sheet metal edges of the damper. However, a porosity of 35-65% gives acceptable results.
Demperen 20 kan være systemdrevet, hvor stillingen til bladet The damper 20 can be system driven, where the position of the blade
22 blir bestemt av oppblåsningen av to belger som angir det statiske innløpstrykket og kjølekravet'fra en lufttermostat. Demperen 20 kan være innstilt ved hjelp av en belg som reagerer på det statiske innløpstrykket og en ytre drivinnretning som en elektrisk eller pneumatisk motor 60 for å drive bladet 22 som følge av kjølekravet. Demperbladet 22 kan også kun bli innstilt av en elektrisk eller pneumatisk motor 60 som reagerer på kjølekravet som vist på fig. 2. Hver av disse stan-dardoperasjonsmodusene til demperen 20 vil være på vanlig måte, men får luftstrømmene og støyreduksjonen bevirket av skjermene 30 og 40. Benet 31 forløper oppfra demperbladet 22 slik at avhengig av benets 31 høyde medfører begynnelses-åpningsbevegelsen på 1,27 til 2,54 cm for bladet 22 at hele luftstrømmen går gjennom perforeringene i benet 31 og strømmer så over perforeringskjermen 40. Nettoresultatet er en reduk-sjon i lavfrekvensstøy på grunn av den resulterende reduksjo-nen i turbulensen. Ytterligere åpningsbevegelser av demperbladet 22 medfører at strømmen går rundt benet 31 med en del av strømmen fremdeles gjennom perforeringene til benet 31. Luftstrømmen vil imidlertid fremdeles være over den perforerte skjermen 40 og derfor vil turbulens og den medfølgende lav-frekvensstøyen bli redusert. Siden denne turbulensen er en fuksjon av strømningsforhindringen begrenser foreliggende oppfinnelse virkningen av forhindringsfunksjonen til skjermen 30 ved å begrense den kun til en del av strømningsbanen og ved at strømningsbanen ikke går gjennom skjermen 40. Det er således ikke til noe tidspunkt kun en forhindret strøm gjennom en smal spalte definert i en del av metallplatedelens kant som danner en del av huset 12. 22 is determined by the inflation of two bellows indicating the static inlet pressure and the cooling demand' from an air thermostat. The damper 20 may be set by means of a bellows which responds to the static inlet pressure and an external drive device such as an electric or pneumatic motor 60 to drive the blade 22 in response to the cooling requirement. The damper blade 22 can also only be set by an electric or pneumatic motor 60 which responds to the cooling requirement as shown in fig. 2. Each of these standard operating modes of the damper 20 will be in the usual way, but the air flows and the noise reduction are effected by the screens 30 and 40. The leg 31 extends upwards from the damper blade 22 so that, depending on the height of the leg 31, the initial opening movement of 1.27 to 2.54 cm for the blade 22 that the entire airflow passes through the perforations in the leg 31 and then flows over the perforation screen 40. The net result is a reduction in low frequency noise due to the resulting reduction in turbulence. Further opening movements of the damper blade 22 cause the flow to go around the leg 31 with part of the flow still through the perforations of the leg 31. However, the air flow will still be over the perforated screen 40 and therefore turbulence and the accompanying low-frequency noise will be reduced. Since this turbulence is a function of the flow obstruction, the present invention limits the effect of the obstruction function of the screen 30 by limiting it to only a portion of the flow path and by the flow path not passing through the screen 40. Thus, at no time is there only an obstructed flow through a narrow gap defined in part of the edge of the sheet metal part which forms part of the housing 12.
Ved et dempersystem som drives ved en luftstrøm på 22,64 m 3/min. og et statisk trykk på 2,54 cm vannsøyle er de enkelt-vis og kombinerte lydreduksjonsegenskapene til skjermen 30 In the case of a damper system operated at an air flow of 22.64 m 3/min. and a static pressure of 2.54 cm water column are the individual and combined sound reduction properties of the screen 30
og 40 (målt som lydeffektnivåer) vist på fig. 3. For denne sammenligningen er perforeringen i skjermene 30 og 40 0,48 cm i diameter og deres senter er anbrakt slik at de danner hjør-nene til likesidede trekanter med lengdesider på 0,64 cm. and 40 (measured as sound power levels) shown in fig. 3. For this comparison, the perforations in screens 30 and 40 are 0.48 cm in diameter and their centers are positioned to form the corners of equilateral triangles with sides of length 0.64 cm.
Det skal bemerkes at de i hvert tilfelle, ved de nedre oktav-bånd, forekommer de beste resultatene når begge skjermene blir benyttet. It should be noted that in each case, at the lower octave bands, the best results occur when both screens are used.
Selv om en beskrevet utførelsesform av foreliggende oppfinnelse har blitt vist og beskrevet vil andre modifikasjoner være mulig for fagmannen på området. F.eks. er vinkelen mellom benene til skjermen 30 avhengig av buen som demperbladet be-veger seg siden det er ønskelig at benet 31 skal være perpendikulært på strømmen om mulig over hele bevegelsesområdet for således å tilveiebringe vesentlig samme strømningsmotstand. Det er derfor ment at omfanget av foreliggende oppfinnelse Although a described embodiment of the present invention has been shown and described, other modifications will be possible for those skilled in the art. E.g. the angle between the legs of the screen 30 depends on the arc in which the damper blade moves since it is desirable that the leg 31 should be perpendicular to the flow if possible over the entire range of movement in order to provide essentially the same flow resistance. It is therefore intended that the scope of the present invention
kun skal bli begrenset av det som fremgår av de medfølgende patentkrav. shall only be limited by what appears in the accompanying patent claims.
Claims (5)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US21101380A | 1980-11-28 | 1980-11-28 |
Publications (3)
Publication Number | Publication Date |
---|---|
NO814052L NO814052L (en) | 1982-06-01 |
NO154321B true NO154321B (en) | 1986-05-20 |
NO154321C NO154321C (en) | 1986-08-27 |
Family
ID=22785241
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO814052A NO154321C (en) | 1980-11-28 | 1981-11-27 | CONTROL UNIT FOR AN AIR DISTRIBUTION SYSTEM. |
Country Status (16)
Country | Link |
---|---|
EP (1) | EP0053302B1 (en) |
JP (2) | JPS57146976A (en) |
KR (1) | KR890000629B1 (en) |
AT (1) | ATE12981T1 (en) |
AU (1) | AU548442B2 (en) |
BR (1) | BR8107664A (en) |
CA (1) | CA1188227A (en) |
DE (1) | DE3170181D1 (en) |
DK (1) | DK154985C (en) |
FI (1) | FI69510C (en) |
IN (1) | IN157260B (en) |
MX (1) | MX154728A (en) |
MY (1) | MY8700214A (en) |
NO (1) | NO154321C (en) |
NZ (1) | NZ199095A (en) |
ZA (1) | ZA817551B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8604229D0 (en) * | 1986-02-20 | 1986-03-26 | Johnston Eng Ltd | Road sweeping vehicles |
JP2596321Y2 (en) * | 1993-07-12 | 1999-06-14 | 三菱重工業株式会社 | Gas rectifier in denitration equipment |
GB2290849B (en) * | 1994-07-01 | 1998-05-27 | Draftex Ind Ltd | Gas or air flow regulators |
US9581353B2 (en) * | 2009-01-23 | 2017-02-28 | Valeo Climate Control Corporation | HVAC system including a noise-reducing feature |
TR201715678A2 (en) * | 2017-10-13 | 2017-10-23 | Dokuz Eyluel Ueniversitesi Rektoerluegue | SILENCER FOR ROAD SWEEPING VEHICLES THAT CAN BE PORTABLE INSTALLED OUTSIDE OF THE CABIN |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT267984B (en) * | 1965-07-12 | 1969-01-27 | Svenska Flaektfabriken Ab | Throttle device for regulating the flow of a gaseous medium in a line |
US3750839A (en) * | 1971-11-01 | 1973-08-07 | Trane Co | Air distribution apparatus |
DE2705060A1 (en) * | 1977-02-08 | 1978-08-10 | Schmidt Hans Guenter Ing Grad | Flow regulation plate for exhaust gas system - has flexible perforated plate movable across flow cross-section in rolling motion |
CA1137877A (en) * | 1977-11-14 | 1982-12-21 | Martin Hirschorn | Packless silencer |
SE7811421L (en) * | 1977-12-07 | 1979-06-08 | Carrier Corp | VALVE DEVICE |
-
1981
- 1981-10-28 CA CA000388891A patent/CA1188227A/en not_active Expired
- 1981-10-29 IN IN692/DEL/81A patent/IN157260B/en unknown
- 1981-10-30 ZA ZA817551A patent/ZA817551B/en unknown
- 1981-11-06 EP EP81109558A patent/EP0053302B1/en not_active Expired
- 1981-11-06 AT AT81109558T patent/ATE12981T1/en active
- 1981-11-06 DE DE8181109558T patent/DE3170181D1/en not_active Expired
- 1981-11-23 FI FI813735A patent/FI69510C/en not_active IP Right Cessation
- 1981-11-25 BR BR8107664A patent/BR8107664A/en not_active IP Right Cessation
- 1981-11-27 DK DK528881A patent/DK154985C/en active
- 1981-11-27 AU AU77952/81A patent/AU548442B2/en not_active Ceased
- 1981-11-27 MX MX190306A patent/MX154728A/en unknown
- 1981-11-27 NO NO814052A patent/NO154321C/en unknown
- 1981-11-27 NZ NZ199095A patent/NZ199095A/en unknown
- 1981-11-27 JP JP56190451A patent/JPS57146976A/en active Pending
- 1981-11-27 KR KR1019810004607A patent/KR890000629B1/en active
-
1984
- 1984-07-30 JP JP1984117113U patent/JPS6049372U/en active Granted
-
1987
- 1987-12-30 MY MY214/87A patent/MY8700214A/en unknown
Also Published As
Publication number | Publication date |
---|---|
NZ199095A (en) | 1984-04-27 |
EP0053302B1 (en) | 1985-04-24 |
DK154985B (en) | 1989-01-16 |
MY8700214A (en) | 1987-12-31 |
FI69510C (en) | 1986-02-10 |
ATE12981T1 (en) | 1985-05-15 |
JPS6049372U (en) | 1985-04-06 |
BR8107664A (en) | 1982-08-24 |
MX154728A (en) | 1987-12-07 |
AU7795281A (en) | 1982-06-03 |
KR890000629B1 (en) | 1989-03-22 |
JPS57146976A (en) | 1982-09-10 |
NO814052L (en) | 1982-06-01 |
CA1188227A (en) | 1985-06-04 |
DK154985C (en) | 1989-06-12 |
AU548442B2 (en) | 1985-12-12 |
JPS6132225Y2 (en) | 1986-09-19 |
ZA817551B (en) | 1982-10-27 |
NO154321C (en) | 1986-08-27 |
EP0053302A1 (en) | 1982-06-09 |
DK528881A (en) | 1982-05-29 |
KR830008072A (en) | 1983-11-09 |
DE3170181D1 (en) | 1985-05-30 |
FI813735L (en) | 1982-05-29 |
FI69510B (en) | 1985-10-31 |
IN157260B (en) | 1986-02-15 |
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